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Frequent Visitor

Creating weighted statistics in DAX

Hi guys,
Unfortunately i dont have idea how to resolve my problem. So i have 2 tables:

 IDA Group A 1 B 1 B 2 B 2 B 2 C 3

The second one:

 IDA Counts A 2 B 4 C 4

So i would like to count from those table weighted statistics by group i mean:
For group 1: ((1/2)+(1/4)+(0/4))/3 = 25%

For group 2: ((0/2)+(3/4)+(0/4))/3 = 25%

for group 3: ((0/2)+(0/4) + (1/4))/3 = 8.3%
I would like to create is as a measure, but as i mention before i don't have idea. I tried by sumx and summarised but i didn't get any rational results.

1 ACCEPTED SOLUTION
Super User

Here's some DAX that works for your example data:

``````Weighted =
VAR _Numerator =
SUMX('Groups Table', DIVIDE(1, RELATED('Counts Table'[Counts])))
VAR _Denominator = COUNTROWS(ALL('Counts Table'))
VAR _Result = DIVIDE(_Numerator, _Denominator)
RETURN
_Result``````

The tables have a relationship like this:

Super User

Here's some DAX that works for your example data:

``````Weighted =
VAR _Numerator =
SUMX('Groups Table', DIVIDE(1, RELATED('Counts Table'[Counts])))
VAR _Denominator = COUNTROWS(ALL('Counts Table'))
VAR _Result = DIVIDE(_Numerator, _Denominator)
RETURN
_Result``````

The tables have a relationship like this:

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